/usr/share/doc/libxext-dev/dpmslib.html is in libxext-doc 2:1.3.2-1ubuntu0.0.14.04.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 | <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>X Display Power Management Signaling (DPMS) Extension</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /><style xmlns="" type="text/css">/*
* Copyright (c) 2011 Gaetan Nadon
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/*
* Shared stylesheet for X.Org documentation translated to HTML format
* http://www.sagehill.net/docbookxsl/UsingCSS.html
* http://www.w3schools.com/css/default.asp
* https://addons.mozilla.org/en-US/firefox/addon/web-developer/developers
* https://addons.mozilla.org/en-US/firefox/addon/font-finder/
*/
/*
* The sans-serif fonts are considered more legible on a computer screen
* http://dry.sailingissues.com/linux-equivalents-verdana-arial.html
*
*/
body {
font-family: "Bitstream Vera Sans", "DejaVu Sans", Tahoma, Geneva, Arial, Sans-serif;
/* In support of using "em" font size unit, the w3c recommended method */
font-size: 100%;
}
/*
* Selection: all elements requiring mono spaced fonts.
*
* The family names attempt to match the proportionally spaced font
* family names such that the same font name is used for both.
* We'd like to use Bitstream, for example, in both proportionally and
* mono spaced font text.
*/
.command,
.errorcode,
.errorname,
.errortype,
.filename,
.funcsynopsis,
.function,
.parameter,
.programlisting,
.property,
.screen,
.structname,
.symbol,
.synopsis,
.type
{
font-family: "Bitstream Vera Sans Mono", "DejaVu Sans Mono", Courier, "Liberation Mono", Monospace;
}
/*
* Books have a title page, a preface, some chapters and appendices,
* a glossary, an index and a bibliography, in that order.
*
* An Article has no preface and no chapters. It has sections, appendices,
* a glossary, an index and a bibliography.
*/
/*
* Selection: book main title and subtitle
*/
div.book>div.titlepage h1.title,
div.book>div.titlepage h2.subtitle {
text-align: center;
}
/*
* Selection: article main title and subtitle
*/
div.article>div.titlepage h2.title,
div.article>div.titlepage h3.subtitle,
div.article>div.sect1>div.titlepage h2.title,
div.article>div.section>div.titlepage h2.title {
text-align: center;
}
/*
* Selection: various types of authors and collaborators, individuals or corporate
*
* These authors are not always contained inside an authorgroup.
* They can be contained inside a lot of different parent types where they might
* not be centered.
* Reducing the margin at the bottom makes a visual separation between authors
* We specify here the ones on the title page, others may be added based on merit.
*/
div.titlepage .authorgroup,
div.titlepage .author,
div.titlepage .collab,
div.titlepage .corpauthor,
div.titlepage .corpcredit,
div.titlepage .editor,
div.titlepage .othercredit {
text-align: center;
margin-bottom: 0.25em;
}
/*
* Selection: the affiliation of various types of authors and collaborators,
* individuals or corporate.
*/
div.titlepage .affiliation {
text-align: center;
}
/*
* Selection: product release information (X Version 11, Release 7)
*
* The releaseinfo element can be contained inside a lot of different parent
* types where it might not be centered.
* We specify here the one on the title page, others may be added based on merit.
*/
div.titlepage p.releaseinfo {
font-weight: bold;
text-align: center;
}
/*
* Selection: publishing date
*/
div.titlepage .pubdate {
text-align: center;
}
/*
* The legal notices are displayed in smaller sized fonts
* Justification is only supported in IE and therefore not requested.
*
*/
.legalnotice {
font-size: small;
font-style: italic;
}
/*
* For documentation having multiple licenses, the copyright and legalnotice
* elements sequence cannot instantiated multiple times.
* The copyright notice and license text are therefore coded inside a legalnotice
* element. The role attribute on the paragraph is used to allow styling of the
* copyright notice text which should not be italicized.
*/
p.multiLicensing {
font-style: normal;
font-size: medium;
}
/*
* Selection: book or article main ToC title
* A paragraph is generated for the title rather than a level 2 heading.
* We do not want to select chapters sub table of contents, only the main one
*/
div.book>div.toc>p,
div.article>div.toc>p {
font-size: 1.5em;
text-align: center;
}
/*
* Selection: major sections of a book or an article
*
* Unlike books, articles do not have a titlepage element for appendix.
* Using the selector "div.titlepage h2.title" would be too general.
*/
div.book>div.preface>div.titlepage h2.title,
div.book>div.chapter>div.titlepage h2.title,
div.article>div.sect1>div.titlepage h2.title,
div.article>div.section>div.titlepage h2.title,
div.book>div.appendix>div.titlepage h2.title,
div.article>div.appendix h2.title,
div.glossary>div.titlepage h2.title,
div.index>div.titlepage h2.title,
div.bibliography>div.titlepage h2.title {
/* Add a border top over the major parts, just like printed books */
/* The Gray color is already used for the ruler over the main ToC. */
border-top-style: solid;
border-top-width: 2px;
border-top-color: Gray;
/* Put some space between the border and the title */
padding-top: 0.2em;
text-align: center;
}
/*
* A Screen is a verbatim environment for displaying text that the user might
* see on a computer terminal. It is often used to display the results of a command.
*
* http://www.css3.info/preview/rounded-border/
*/
.screen {
background: #e0ffff;
border-width: 1px;
border-style: solid;
border-color: #B0C4DE;
border-radius: 1.0em;
/* Browser's vendor properties prior to CSS 3 */
-moz-border-radius: 1.0em;
-webkit-border-radius: 1.0em;
-khtml-border-radius: 1.0em;
margin-left: 1.0em;
margin-right: 1.0em;
padding: 0.5em;
}
/*
* Emphasis program listings with a light shade of gray similar to what
* DocBook XSL guide does: http://www.sagehill.net/docbookxsl/ProgramListings.html
* Found many C API docs on the web using like shades of gray.
*/
.programlisting {
background: #F4F4F4;
border-width: 1px;
border-style: solid;
border-color: Gray;
padding: 0.5em;
}
/*
* Emphasis functions synopsis using a darker shade of gray.
* Add a border such that it stands out more.
* Set the padding so the text does not touch the border.
*/
.funcsynopsis, .synopsis {
background: #e6e6fa;
border-width: 1px;
border-style: solid;
border-color: Gray;
clear: both;
margin: 0.5em;
padding: 0.25em;
}
/*
* Selection: paragraphs inside synopsis
*
* Removes the default browser margin, let the container set the padding.
* Paragraphs are not always used in synopsis
*/
.funcsynopsis p,
.synopsis p {
margin: 0;
padding: 0;
}
/*
* Selection: variable lists, informal tables and tables
*
* Note the parameter name "variablelist.as.table" in xorg-xhtml.xsl
* A table with rows and columns is constructed inside div.variablelist
*
* Set the left margin so it is indented to the right
* Display informal tables with single line borders
*/
table {
margin-left: 0.5em;
border-collapse: collapse;
}
/*
* Selection: paragraphs inside tables
*
* Removes the default browser margin, let the container set the padding.
* Paragraphs are not always used in tables
*/
td p {
margin: 0;
padding: 0;
}
/*
* Add some space between the left and right column.
* The vertical alignment helps the reader associate a term
* with a multi-line definition.
*/
td, th {
padding-left: 1.0em;
padding-right: 1.0em;
vertical-align: top;
}
.warning {
border: 1px solid red;
background: #FFFF66;
padding-left: 0.5em;
}
</style></head><body><div class="book"><div class="titlepage"><div><div><h1 class="title"><a id="dpmslib"></a>X Display Power Management Signaling (DPMS) Extension</h1></div><div><h2 class="subtitle">X Consortium Standard</h2></div><div><div class="authorgroup"><div class="author"><h3 class="author"><span class="firstname">Rob</span> <span class="surname">Lembree</span></h3><div class="affiliation"><span class="orgname">Digital Equipment Corporation<br /></span></div><code class="email"><<a class="email" href="mailto:lembree@zk3.dec.com">lembree@zk3.dec.com</a>></code></div></div></div><div><p class="releaseinfo">X Version 11, Release 7.7</p></div><div><p class="releaseinfo">Version 1.0</p></div><div><p class="copyright">Copyright © 1996 Digital Equipment Corporation</p></div><div><div class="legalnotice"><a id="idp50818628"></a><p>
Permission to use, copy, modify, distribute, and sell this
documentation for any purpose is hereby granted without fee,
provided that the above copyright notice and this permission
notice appear in all copies. Digital Equipment Corporation
makes no representations about the suitability for any purpose
of the information in this document. This documentation is
provided "as is" without express or implied warranty.
</p><p>X Window System is a trademark of The Open Group.</p></div></div></div><hr /></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="chapter"><a href="#overview">1. Overview</a></span></dt><dt><span class="chapter"><a href="#dpms_functions">2. DPMS Functions</a></span></dt></dl></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a id="overview"></a>Chapter 1. Overview</h1></div></div></div><p>This extension provides X Protocol control over the VESA Display
Power Management Signaling (DPMS) characteristics of video boards
under control of the X Window System.
</p><p>
Traditionally, the X Window System has provided for both blanking and
non-blanking screen savers. Timeouts associated with these built-in
screen saver mechanisms are limited to idle (dwell) time, and a change
timeout that specifies the change interval for non-blanking screen savers.
</p><p>
The United States' Environmental Protection Agency (EPA) Energy Star program
requires that monitors power down after some idle time by default.
While it is possible to simply overload the existing screen saver timeouts,
this solution leaves the non-privileged user little to no control over
the DPMS characteristics of his or her system. For example, disabling
DPMS would require some unintended side effect in the core screen saver,
such as disabling the changing of a non-blanking screen saver. Providing
clients with this control requires an extension to the core X Window System
Protocol, and this extension seeks to fill this gap.
</p><p>
There are four power levels specified by the Video Electronics Standards
Association (VESA) Display Power Management Signaling (DPMS) standard.
These are mapped onto the X DPMS Extension like this:
</p><div class="literallayout"><p><br />
<code class="function">DPMS Extension Power Levels</code><br />
0 DPMSModeOn In use<br />
1 DPMSModeStandby Blanked, low power<br />
2 DPMSModeSuspend Blanked, lower power<br />
3 DPMSModeOff Shut off, awaiting activity<br />
</p></div></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a id="dpms_functions"></a>Chapter 2. DPMS Functions</h1></div></div></div><div class="funcsynopsis"><a id="DPMSQueryExtention"></a><p><code class="funcdef">Bool <strong class="fsfunc">DPMSQueryExtention</strong>(</code>Display <var class="pdparam">*display</var>, int <var class="pdparam">event_base</var>, int <var class="pdparam">error_base</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term"><span class="emphasis"><em>*display</em></span></span></p></td><td><p>Specifies the connection to the X server.</p></td></tr><tr><td><p><span class="term"><span class="emphasis"><em>event_base</em></span></span></p></td><td><p>Specifies the return location for the assigned base event</p></td></tr><tr><td><p><span class="term"><span class="emphasis"><em>error_base</em></span></span></p></td><td><p>Specifies the return location for the assigned base error</p></td></tr></tbody></table></div><p>
The DPMSQueryExtension function queries the X server to determine the
availability of the DPMS Extension. If the extension is available, the
return value is TRUE, and <span class="emphasis"><em>event_base</em></span> and
<span class="emphasis"><em>error_base</em></span> are set to the base event number
and base error number for the extension, respectively. Otherwise, the
return value is FALSE, and the values of
<span class="emphasis"><em>event_base</em></span> and
<span class="emphasis"><em>error_base</em></span> are undefined.
</p><div class="funcsynopsis"><a id="DPMSGetVersion"></a><p><code class="funcdef">Status <strong class="fsfunc">DPMSGetVersion</strong>(</code>Display <var class="pdparam">*display</var>, int <var class="pdparam">*major_version</var>, int <var class="pdparam">*minor_version</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term"><span class="emphasis"><em>display</em></span></span></p></td><td><p>Specifies the connection to the X server.</p></td></tr><tr><td><p><span class="term"><span class="emphasis"><em>major_version</em></span></span></p></td><td><p>Specifies the return location for the extension major version.</p></td></tr><tr><td><p><span class="term"><span class="emphasis"><em>minor_version</em></span></span></p></td><td><p>Specifies the return location for the extension minor version.</p></td></tr></tbody></table></div><p>
The DPMSGetVersion function returns the version of the DPMS extension
implemented by the X server. The version is returned in
<span class="emphasis"><em>major_version</em></span> and
<span class="emphasis"><em>minor_version</em></span>.
The major version and minor version for this specification are '1' and '1',
respectively. The major version will be incremented for protocol
incompatible changes, and the minor version will be incremented for small,
upwardly compatible changes.
</p><div class="funcsynopsis"><a id="DPMSCapable"></a><p><code class="funcdef">Bool <strong class="fsfunc">DPMSCapable</strong>(</code>Display <var class="pdparam">*display</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term"><span class="emphasis"><em>display</em></span></span></p></td><td><p>Specifies the connection to the X server.</p></td></tr></tbody></table></div><p>
The DPMSCapable function returns the DPMS capability of the X server, either
TRUE (capable of DPMS) or FALSE (incapable of DPMS). The capability of an
X server is implementation defined. For example, if a multi-headed X server
is capable of DPMS on one head, and incapable on another, the truth value of
this function is defined by the X server implementation.
</p><div class="funcsynopsis"><a id="DPMSSetTimeouts"></a><p><code class="funcdef">Status <strong class="fsfunc">DPMSSetTimeouts</strong>(</code>Display <var class="pdparam">*display</var>, CARD16 <var class="pdparam">standby</var>, CARD16 <var class="pdparam">suspend</var>, CARD16 <var class="pdparam">off</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term"><span class="emphasis"><em>display</em></span></span></p></td><td><p>Specifies the connection to the X server.</p></td></tr><tr><td><p><span class="term"><span class="emphasis"><em>standby</em></span></span></p></td><td><p>Specifies the new standby timeout in seconds.</p></td></tr><tr><td><p><span class="term"><span class="emphasis"><em>suspend</em></span></span></p></td><td><p>Specifies the new suspend timeout in seconds.</p></td></tr><tr><td><p><span class="term"><span class="emphasis"><em>off</em></span></span></p></td><td><p>Specifies the new off timeout in seconds.</p></td></tr></tbody></table></div><p>
The DPMSSetTimeouts function permits applications to set the timeout values
used by the X server for DPMS timings.
</p><p>
The value <span class="emphasis"><em>standby</em></span> is the amount of time of
inactivity in seconds before standby mode is invoked. The actual effects of
this mode are implementation defined, but in the case of DPMS compliant
hardware, it is implemented by shutting off the horizontal sync signal,
and pulsing the vertical sync signal.
Standby mode provides the quickest monitor recovery time. Note also that
many monitors implement this mode identically to suspend mode. A value
of zero disables this mode.
</p><p>
The value <span class="emphasis"><em>suspend</em></span> is the amount of time of
inactivity in seconds before the second level of power savings is invoked.
Suspend mode's physical and electrical characteristics are implementation
defined, but in DPMS compliant hardware, results in the pulsing of the
horizontal sync signal, and shutting off of the vertical sync signal.
Suspend mode recovery is considered to be slower than standby mode, but
faster than off mode, however this is monitor dependent. As noted above,
many monitors implement this mode identically to standby mode. A value of
zero disables this mode.
</p><p>
The value <span class="emphasis"><em>off</em></span> is the amount of time of
inactivity in seconds before the third and final level of power savings is
invoked. Off mode's physical and electrical characteristics are
implementation defined, but in DPMS compliant hardware, is implemented by
shutting off both horizontal and vertical sync signals, resulting in
the power-down of the monitor. Recovery time is implementation dependant,
but frequently is similar to the power-up time of the monitor. A value
of zero disables this mode.
</p><p>
Chronologically, standby mode occurs before or simultaneously with
suspend mode, and suspend mode must occur before or simultaneously with
off mode. Therefore, non-zero mode timeout values must be greater than
or equal to the timeout values of earlier modes. If inconsistent values
are supplied, a BadValue error will result.
</p><div class="funcsynopsis"><a id="DPMSGetTimeouts"></a><p><code class="funcdef">Status <strong class="fsfunc">DPMSGetTimeouts</strong>(</code>Display <var class="pdparam">*display</var>, CARD16 <var class="pdparam">*standby</var>, CARD16 <var class="pdparam">*suspend</var>, CARD16 <var class="pdparam">*off</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term"><span class="emphasis"><em>display</em></span></span></p></td><td><p>Specifies the connection to the X server.</p></td></tr><tr><td><p><span class="term"><span class="emphasis"><em>standby</em></span></span></p></td><td><p>Specifies the new standby timeout in seconds.</p></td></tr><tr><td><p><span class="term"><span class="emphasis"><em>suspend</em></span></span></p></td><td><p>Specifies the new suspend timeout in seconds.</p></td></tr><tr><td><p><span class="term"><span class="emphasis"><em>off</em></span></span></p></td><td><p>Specifies the new off timeout in seconds.</p></td></tr></tbody></table></div><p>
The DPMSGetTimeouts function retrieves the timeout values used by the X
server for DPMS timings.
</p><p>
The value <span class="emphasis"><em>standby</em></span> is the amount of time of
inactivity in seconds before standby mode is invoked. A value of zero
indicates that this mode has been disabled.
</p><p>
The value <span class="emphasis"><em>suspend</em></span> is the amount of time of
inactivity in seconds before the second level of power savings is invoked.
A value of zero indicates that this mode has been disabled.
</p><p>
The value <span class="emphasis"><em>off</em></span> is the amount of time of
inactivity in seconds before the third and final level of power savings is
invoked. A value of zero indicates that this mode has been disabled.
</p><div class="funcsynopsis"><a id="DPMSEnable"></a><p><code class="funcdef">Status <strong class="fsfunc">DPMSEnable</strong>(</code>Display <var class="pdparam">*display</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term"><span class="emphasis"><em>display</em></span></span></p></td><td><p>Specifies the connection to the X server.</p></td></tr></tbody></table></div><p>
The DPMSEnable function enables DPMS on the specified display. When
enabled, DPMS will use the currently saved timeout values, and will
invoke the DPMS power mode appropriate for the amount of time that
the workstation input devices have been idle. If DPMSEnable is invoked
on a display with DPMS already enabled, no change is made, and no
error is returned. If DPMSEnable is invoked on a display without
support for DPMS, no change is made and no error is returned.
</p><div class="funcsynopsis"><a id="DPMSDisable"></a><p><code class="funcdef">Status <strong class="fsfunc">DPMSDisable</strong>(</code>Display <var class="pdparam">*display</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term"><span class="emphasis"><em>display</em></span></span></p></td><td><p>Specifies the connection to the X server.</p></td></tr></tbody></table></div><p>
The DPMSDisable function disables DPMS on the specified display. When
disabled, DPMS returns the display to DPMSModeOn. If DPMSDisable is
invoked on a display with DPMS already disabled, no change is made,
and no error is returned. If DPMSDisable is invoked on a display
without support for DPMS, no change is made and no error is returned.
</p><div class="funcsynopsis"><a id="DPMSForceLevel"></a><p><code class="funcdef">Status <strong class="fsfunc">DPMSForceLevel</strong>(</code>Display <var class="pdparam">*display</var>, CARD16 <var class="pdparam">level</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term"><span class="emphasis"><em>display</em></span></span></p></td><td><p>Specifies the connection to the X server.</p></td></tr><tr><td><p><span class="term"><span class="emphasis"><em>level</em></span></span></p></td><td><p>Specifies the level to force power to.</p></td></tr></tbody></table></div><p>
The DPMSForceLevel function forces a DPMS capable display into the
specified power level. The <span class="emphasis"><em>level</em></span> must be one of
DPMSModeOn, DPMSModeStandby, DPMSModeSuspend, or DPMSModeOff.
Values other than these will result in a BadValue error. If DPMS
is disabled on the display, a BadMatch protocol error will result.
</p><p>Status DPMSInfo(<span class="emphasis"><em>display, power_level, state</em></span>)</p><div class="funcsynopsis"><a id="DPMSInfo"></a><p><code class="funcdef">Status <strong class="fsfunc">DPMSInfo</strong>(</code>Display <var class="pdparam">*display</var>, CARD16 <var class="pdparam">power_level</var>, BOOL <var class="pdparam">*state</var><code>)</code>;</p></div><div class="variablelist"><table border="0" class="variablelist"><colgroup><col align="left" valign="top" /><col /></colgroup><tbody><tr><td><p><span class="term"><span class="emphasis"><em>display</em></span></span></p></td><td><p>Specifies the connection to the X server.</p></td></tr><tr><td><p><span class="term"><span class="emphasis"><em>power_level</em></span></span></p></td><td><p>Specifies the current power level.</p></td></tr><tr><td><p><span class="term"><span class="emphasis"><em>state</em></span></span></p></td><td><p>Specifies the current DPMS state.</p></td></tr></tbody></table></div><p>
The DPMSInfo function returns information about the current DPMS state.
The <span class="emphasis"><em>state</em></span> return parameter indicates whether
or not DPMS is enabled (TRUE) or disabled (FALSE). The
<span class="emphasis"><em>power_level</em></span> return parameter indicates the
current power level (one of DPMSModeOn, DPMSModeStandby, DPMSModeSuspend,
or DPMSModeOff.)
</p></div></div></body></html>
|